Edmund s



E. S. CHURCH.

FUEL REGULATING DEVICE FOR EXPLOSIVE NGINES.

APPLICATION FILED IAN. 6. Isle.

Ml a'lug 2t on the Hoa-t. The oat serves to ED sTATEs PATENT oEEIoE.

EDMUND S. CHURCH, F CHICAGO, ILLINOIS, ASSIGNOR TO AUTOMATIC CRBURETO COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION 0F ILLINOIS.

" lE'UEIr-REGULATING DEVICE FOR Iii,XP'LOSIVEIEII1NGrIII'ES.i4

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.Application led January 6, 1916. Serial No. 70.564.

To all whomy it may concern lBe it known that ll, EDMUND S. CHURCH, a citizen of the United States, and a resident of Chicago, in the county of Cook andState take pipe.

Anfother object of .the invention is to provide an improved regulating device which is simple'in construction and eicient in operatioir y Tite invent-ion consists in the several novel fea-t1, res hereinafter set forth and more particnl-rly defined by claims at the conclusion here i. l

llii the'drawings: Figure 1 is a vertical section of a carbureter and pipe leading to the jengine. equipped with the, improved regulating device, which is shown in position assumed when engine is running with a light load. Fig. 2 is a section of the regulating device.

Fig. 3 is a section taken online 3 3 of lFig. 2. a

The regulating device is illustrated as applied to the branch 4c of a manifold 5 lead# ing to the cylinders of the engine. A carbureter, which may be'of any suitable construction. is connected to deliver combustible mixture to pipe 4. 'llhe carbureter illustrated f comprises a suitable easing l0 in which a chamber 11 is'forliied for containing liquid tuel supplied thereto by'a pipe 12. A column ci liquid is maintained at a predetermined level in chamber 11 by a' fioat 14, which is provided with a stem 15 which is vertically guided in the cover 16 of the casing. l'.lhis float is operatively connected to an admission valve 17 which controls the suppl-7 oit' liquid to the chamber Valve 17 isfprovided with a guide 18 at its upper end which slides on a guide-rod 19 and is 'operatively connected to the lioat by the leverj 20, which has a forked end 21` in engagement with the stem offvalve 17. Lever "Q0 is pivoted to the casing, fat 22, and its .other end is pivotally connected, as at 23, to

Specification of Letters Patent.

Patented July I., 1919..

automatically maintain a column of liquid at a predetermined level..

A nozzle Q5 terminates slightly above the level of the liquid in chamber 11, so that the liquid will not overflowV from the nozzle by gravity and will be delivered from the nozzle by suction. 'llieliquid is delivered to the nozzle by a duct 26 formed in the casing.

A needle valvev27 serves to regulate the maximum iiow of liquid to the nozzle 25.

'Av choke tube 34 is formed in the casing around nozzle 25o and extends above the upper end "of the nozzle. A primary airinlet 35 is formed in the bottom of the casing to admit air into said tube alid around the nozzle. An intake' 30 for auxiliaryvv air is connected-to the chamber around the tube 34 and this intake is controlled by a valve 31 which is adapted to fit against a seat 32 and is yieldingly held in closed position by a suitable `spring 33. Air admitted through intake 30 -passes through the chamber around tube 34 and thence to the throttle 39 for con trolling the volume of mixed air and gas supplied to the engine. Air passing through tube 3l exerts a suction upon theliquid in the nozzle 25 and causes the liquid to be lifted outy of the nozzle and mixedtherewith,-

and this mixture, when the suction is sufcient to open valve 31. is mixed with the auxiliary air fromzintake 30 in the chamber above tube'34. to which the pipe exten- .sion 10, is connected. The mixture passes from chamber 37 into pipe 10a. A throttle valve 39 pivoted in pipe 10a, controls the vol'ume of'tluid supplied to the engine. The y throttle., valve is manually controlled and any suitable. connection may be used for shiftingjit to vary the volume'of theV Huid supply.

'l'lhe 4improved automatic device for regu'- lating the mixture according to thesuction 0f the' Huid passing to .the engine, comprises a nipple or hollow plug 50 which has a screw-threaded portion 51 at its inner end which is adapted to pass through and be secured in the 4Wall of branclrpipee of the mtakemaniiold. Aplnnger 52 is. slidably fitted in the outer portion of nipple 50. VA dllphlagm has its central portion secure-d to said plunger vand its marginal portion secured to a casing 54 which is secured on the outer end of nipple 50. Casing 54 is formed of members 55 and 56 which may be formed of sheet metal'. The marginal portion of lim) one casing is lapped around the other, the

'l margin of the diaphragm being securely clamped between the members. Member 55 is shaped or extended outwardly from the plunger 52 to form avacuum chamber 57 on vthe, outer` side of the diaphragm. This f intake 4.are in constant communica-tion and stantially reached the limit of its expansion and is not effective toshiftthe plug ini Vso the branch pipe 4 and chamber 57 will be. under the same suction. A spring 59 between the diaphragm and member 55 is provided to yieldingly retain the plunger `52 and diaphragm in normal position shown in Fig. 2. In this position, the spring hassubwardly. An opening 60 in member 55 admits air'to the inner side of the diaphragm and to the chamber between the diaphragm and casing-member 56. Plunger 52 Vis provided with air ports 61 adapted'to be shifted into registry with air ducts 62 disposed in nipple 50 and inwardly of the diaphragm, to admit airfrom the outside to the `nipple v50.

The regulating device may be rendered inoperative to admit air to the intake manifold, as may sometimes be desired in starting the engine, by a suitable closure 68 which is pivoted to casing member 56, so that it may 'be swung into position to closeopening 60.

' Normally, the regulating device will be in the position shown in Fig. 2.` In starting, the opening .60 may be closed if necessary toprevent the mixture passing to the engine from 'being diluted by the regulating device. In practise, however, this is seldom necessary, except where there 1s extreme difficulty in starting. When the engine is running and the opening 60 is uncovered,

the regulating device will operate automatically in response to variationsl in suction in the 'branch-pipe 4 of the intake manifold. When the engine is idling c'. e., running without a substantial load, it will be running at comparatively' high speed and cause ai high degree of suction in the intake, because the throttle 39 is then usually set to permit a` comparatively small volume of fluid to pass tol the engine. 'As a result of this high suction, which is communicated -to the chamber 57, diaphragm 53 will move plunger 52 outwardly to bring ports 61 and ducts 62 into registry more or less, according to the degree of suction in thevacuum4 chamber 57. Asa result, the mixture passing to the engine will be diluted, because at such time, the load upon the engine does not require arieh mixture. When the engine is running at averagespeed, under a normal load, for example, when used to drive an automobile and the latter -is running on level ground at average speed, at which time the throttle will be 'open more `than when the engine is idling, there will lbe suiiicient vacuum in chamber 57 to cause the diaphragm to operate plunger 52 to admitI additional air to the intake to form a substantially perfect mixture, as shown in Fig. l. When the load upon the engine is abnormal e. g., when the automobile is ybeing driven'up an incline, the suction in the intake is comparatively low in degree, because thethrottle at such time is set to allow full or greater volume of flow of iuid to the intake and at such `umn chamber 57, so that the admission of air through the regulating device will 'be partially or wholly cut off, thus'resulting in enriching the mixture` responsively to the load upon the engine.

It will be observed that the ports 61 are peripheral and as the plunger 52 slides 'outwardly the open area of the ports will gradually increase and after the ports 61 have passed into full registry with the ports 62, further outward movement will cause a gradual restriction of the air inlet. As a result, as the speed of the engine increases to a point above normal, running with a normal load, the supply of air will be gradually reduced to gradually enrich the mixture so that greater speed can be attained.

The invention thus exemplifies an improved automatic regulating device whereby the mixture in transit to the engine will be 100 diluted or enriched responsively to the variation of suction of they mixture after it has passed the Vthrottle to automatically adapt the mixture for the load upon the engine. The improved' device operates independently of 105 the carbureter, i. e., does not vary the operation of the carbureter parts.

The regulating device is simple in construction and can be readily attached to the intake of an engine of usual construction 110 without modification orreconstrnction of the carbureter.

The invention is not to be understood as restricted to the details set forth, since these may be modified within the scope of'the ap- 115 pended claims, without departing from the spirit and scope of the invention.

Having thus described the invention, what I claim as new and desire to secure by Letters Patent, is:

1. A'regulating device for controlling the supply ofla fluid to explosive engines comprising a nipple having means at one of its ends adapted for attachment to the 'intake of an engine, a tubular valve slidably mount- 125 ed in 4said nipple, a diaphragm secured to the outer end of said valve, an admission port controlled 'by said valve, a suction chamber disposed at the outside of the diaphragm, and means secured to the valve' and 130 diaphragm extending through the nipple and communicating with said chamber and the chamber in the intake.

2. A regulating device for controlling?,- the supplyv of a Huid to explosive engines comprising a nipple having means at one of its 'ends adapted for attachment to the intake of an engine, a tubular valve slidably mounted in said nipple, a diaphragm'secured to the outer end of said valve, an admission port controlled by said valve, a suction chamber disposed at the outside of the diaphragm, and a tube extending through said diaphragm and through said nipple having a duct communicating with said chamber and the intake..

B. A regulating device for controlling 'the supply of a luidto explosive engines comprising a nipple having means at one of its ends adapted for attachment to the intake of an engine, a tubular valve slidably mounted in said nipple, a diaphragm secured to the outer end of said valve, an admission port controlled by said valve, a suction chamber disposed at theoutside of the diaphragm, means secured to the valve and diaphragm extending through the nipple and communi eating with said chamber and the chamber in the intake, and a supporting ring between the nipple and the diaphragm having an inlet therein.

' EDMUND S. CHURCH. 

